Hi Gyro, thanks for the reply.
Version 1.0.24 contains the source code and I downloaded it from the Peaktech site (peaktech.de), whose 1290 model is the Owon VDS1022 (rebranded). (https://www.peaktech.de/detalle-del-producto/kategorie/pc-oszilloskope/produkt/p_1290.html)
The only difference in Peaktech software with that of Owon is the logo and configuration files uppersoft.dso.prefs.default.ini that contain the texts and url of the About window. I overwritten these files with those of Owon.
I have not got an original version 1.0.23, the ones I have are modified. Comparing them with 1.0.24 it seems that the changes are minimal (most seem to be changes made by third parties to the version 1.0.23 that I got). If you know of a link to an original version 1.0.23 available to download, I would like to indicate it, so I can compare it with 1.0.24.
I do not recall whether this useful resource, which also has modified versions of the shell, was mentioned VDS1022
https://github.com/florentbr/Owon-VDS1022
I do not recall whether this useful resource, which also has modified versions of the shell, was mentioned VDS1022
https://github.com/florentbr/Owon-VDS1022
I tested USB isolator based on ADUM4160 with VDS1022I.
https://www.aliexpress.com/item/32909293430.html?spm=a2g0o.productlist.0.0.4a6d73d0WWRYdv&algo_pvid=5bd4a6ec-78d8-4367-b985-da6000cf8f4d&algo_expid=5bd4a6ec-78d8-4367-b985-da6000cf8f4d-1&btsid=cc875904-9ad3-45a3-b688-a786dd8d88a9&ws_ab_test=searchweb0_0,searchweb201602_10,searchweb201603_55
This design allows external power supply of the oscilloscope from the power bank and saves the notebook battery. You need to use high quality and short USB cables. When used as an insulator it is necessary to place the power bank together with the module in an insulated box.
@indman:
Sorry to report a minor bug in your portable s/w version, that you linked in reply#450.
After some experimenting, I found that both \flash_text\flashmemory.txt and \configuration\com.owon.uppersoft.dso\pref.properties seem to be involved in storage of calibration data. Copying both files from my previous (camomille) installation restored the zero offsets.
I am not surprised that your portable snapshot would contain calibration data for your specific unit, what did surprise me is that Factory Reset and Self Cal didn't completely resolve it - curious. The good thing is that these two files appear to hold all of the relevant calibration data - I don't think anything gets stored in Flash on the unit.
@indman:
Sorry to report a minor bug in your portable s/w version, that you linked in reply#450.
In playing around, I noticed that with the probes shorted and sensitivity set to 5mV/div (Probe x1 setting), the CH1 trace had virtually no noise compared to CH2. By tying the probes together, I found that instead of 5mV/div it is actually selecting 500mV/div. This is duplicated on the other probe multiplier settings (eg. 5V instead of 50mV on probe X10 etc.).
Hi Gyro, thanks for the reply.
Version 1.0.24 contains the source code and I downloaded it from the Peaktech site (peaktech.de), whose 1290 model is the Owon VDS1022 (rebranded). (https://www.peaktech.de/detalle-del-producto/kategorie/pc-oszilloskope/produkt/p_1290.html)
The only difference in Peaktech software with that of Owon is the logo and configuration files uppersoft.dso.prefs.default.ini that contain the texts and url of the About window. I overwritten these files with those of Owon.
I have not got an original version 1.0.23, the ones I have are modified. Comparing them with 1.0.24 it seems that the changes are minimal (most seem to be changes made by third parties to the version 1.0.23 that I got). If you know of a link to an original version 1.0.23 available to download, I would like to indicate it, so I can compare it with 1.0.24.
It's a confusing world. I had no idea that the Peaktech was an Owon rebrand!
Yes sure, I have uploaded my archive of all original Owon versions in captivity to https://ufile.io/3mgf30c5 (use the free download button, valid for 30 days).
Curious.
No I don't think the bug has always been there - see the screenshots that I posted back in 2015 (Hey this thread is useful ) in reply #2 and #3, I also had measurements turned on... https://www.eevblog.com/forum/testgear/owon-vds1022i-quick-teardown-(versus-the-hantek-6022be)/msg739874/#msg739874
I forgot to note which version I was running back then but I'd lay odds that it was V1.0.23 or earlier.
Time for some version investigation again. Luckily I have them all (as do camomille and indman now.)
EDIT: I'm confused now, I've just been back to V1.0.4 and am still seeing it. It's got me wondering if something has got modified in the hardware configuration!
P.S. Once you have installed once (drivers), you don't need to keep re-installing each version - you can just unzip (7zip works) each OWON_VDS_C2_1.0.xx_Setup.exe into a separate folder and run it from there.
So does the question remain who was the ancestor of this shell - OWON or PeakTech?
I am now using a version from florentbr(base v1.0.30) with additions that have already been discussed here. I also wrote a letter to florentbr thanking him and invited him to take part in this topic. But I haven 't received a response from him yet.
I'm having trouble installing on win7 64bit though, the script doesn't work for me. I have Java V8 installed but it doesn't seem to see it and its attempt to download it fails.
Unfortunately this version misses the one function that started the discussion with camomille (a few pages back) and prompted his interest in learning and modifying the Java code - that was making the save button on the main screen save a graphic image file, rather than a text file.
Hello everyone,
I am attentively your discussion around the problem CH1, later I will look for why this shift of step.
If I understood correctly, when the 2 channels are on the same value displayed on the selector, channel 1 is shifted by 2 steps in real amplitude.
example:
CH1 = 5mV / div selector, actual sensitivity to the screen = 500mV / div
CH2 = 5mV / div selector, actual sensitivity to the screen = 5mV / div
is it this ?
Alain
I can not see the problem of CH1
my settings for the 2 channels:
AC 5 mV X1 probes X1